The North American species of Asterella,
Evans, Alexander W. 1868-1959.
The North American species of Asterella, by Alexander W. Evans. - Washington, Govt. print. off., 1920. - v, 247-312, vii-viii p. 25 cm. - U. S. National museum. Contributions from the U.S. National herbarium, v. 20, pt. 8 .
agr20000971
Asterella.
QK1 / .U5 vol. 20, pt. 8
The North American species of Asterella, by Alexander W. Evans. - Washington, Govt. print. off., 1920. - v, 247-312, vii-viii p. 25 cm. - U. S. National museum. Contributions from the U.S. National herbarium, v. 20, pt. 8 .
agr20000971
Asterella.
QK1 / .U5 vol. 20, pt. 8